US2829157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel hydantoic acids and their alkyl esters
Assignee: Individual
•
Filing: 1953-03-10
•
Granted: 1958-04-01
•
Expires: 1973-03-10
Abstract
No abstract record available.
Inventors
- 👤 Leonard L Mckinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:50
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D233/74; C07C; C07C275/00; C07C275/04; C07C275/06; C07C275/16; Y; Y10; Y10S; Y10S260/00; Y10S260/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2421233A
Cited
US2564648A
Cited
US2561284A
Cited
US2605285A
Cited
US2572568A
Cited
US2650247A
Cited
US2796407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |